Panel space and mounting — 45 mm wide, 165 mm deep
The 3RA6120-1DP33 occupies 45 mm width on standard DIN rail — three 9 mm module slots — with a depth of 165 mm and height of 170 mm. That depth matters when you're fitting it into a 200 mm deep enclosure; you've got 35 mm clearance behind the rail for wiring and the plug-in main circuit connector. Mounting position is unrestricted — vertical, horizontal, or any angle — and the screw-and-snap-on fastening means you can pre-wire the harness and snap the starter onto the rail without removing terminals.
Interrupting capacity and motor protection — 53 kA at 400 V
Rated 53 kA at 400 V, this starter handles high-fault panels without needing a separate upstream fuse or breaker for SCCR compliance. At 500 V it's still rated 3 kA, and at 690 V the same 3 kA — so it's usable on 400 V systems with high available fault current, but on 690 V systems you'll need to verify the fault level at the panel. The adjustable Trip Class (10 and 20) lets you match the thermal curve to the motor start profile — Class 10 for fast-starting pumps and fans, Class 20 for high-inertia loads like conveyors or centrifuges that need a longer acceleration ramp without nuisance tripping.
Motor power ratings across voltages
The 12 A continuous rating at 480/600 V means it's also a fit for 5 hp motors on 480 V North American systems.
Control voltage and coil consumption — universal AC/DC 110-240 V
That universal input simplifies panel wiring — one control transformer covers both the starter and the PLC power supply, and the low coil draw keeps the control transformer sizing modest.
Wiring terminals — solid and stranded capacity
Accepts solid wire 0.5-4 mm² (single) or 2x 0.5-2.5 mm² (two conductors per clamp). That's enough for 4 mm² supply tails on a 5.5 kW motor circuit, and the dual-conductor rating lets you daisy-chain the supply through multiple starters without extra terminal blocks.
Environmental ratings — industrial panel ready
Rated for continuous operation per IEC 60947-6-2, pollution degree 3, operating temperature -20 to +60 °C, and storage/transport -55 to +80 °C. Shock resistance 6g (10 ms, 3 shocks per axis) and vibration resistance to 20 m/s² at 5.8-500 Hz — it survives machine-mount vibration on conveyors and pumps without loosening.